Easily Convert AAC to M4R Format
Want to set AAC files you like as your iPhone ringtone, very easy. On this page AAC to M4R Converter, a very good iphone ringtone maker, is recommended. The powerful Converter supports converting video formats like AVI, MPEG, WMV, DivX, MP4, H.264/AVC, AVCHD, MKV, RM, MOV, XviD, 3GP, audio formats like MP3, WMA, WAV, M4A, AAC to M4R iphone ringtone format.
Good Way to Convert AAC to M4R with AAC to M4R Converter
Free download the software Xilisoft iPhone Ringtone Maker and install it in your pc. It is very easy to use this AAC to M4R Converter. Let's try together.
Step 1. See the picture below, click "Browse" button to add aac file you want to set as iphone ringtone. The powerful program lets you customize ringtone duration. Drag the two sliders to set exact start time and end time of the segment you want and turn it into iPhone ringtone. Click Play button to listen to the music.

Step 2. Click "Browse" button to change the output folder which the converted file will be stored. "Export to iPhone" is to direcly transfer the converted file to your iphone after successful conversion. Then activate the software to convert aac to m4r by clicking "Generate" button.

See the picture below, the conversion has finished.
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Now you have learned about the power of AAC to M4R Converter. Come to free download and have a try. It will be a "must have" utility and good helper for iPhone users.